The navigation lock was constructed mainly with a movable crane that ran on rails within the lock passage. The intake ports are seen here at the upstream face of the lock on either side of the future boat passage. On the right can be seen the concrete key that anchors the dam to its earth-fill portion, yet to be built at this time. (Walter Volovsek)

The navigation lock was constructed mainly with a movable crane that ran on rails within the lock passage. The intake ports are seen here at the upstream face of the lock on either side of the future boat passage. On the right can be seen the concrete key that anchors the dam to its earth-fill portion, yet to be built at this time. (Walter Volovsek)

Walter Volovsek: Retrospectives — Arrow Dam 6

The navigation lock was constructed with a movable crane that ran on rails within the lock passage.

Arrow Dam 6

The navigation lock was constructed mainly with a movable crane that ran on rails within the lock passage. The intake ports are seen here at the upstream face of the lock on either side of the future boat passage. On the right can be seen the concrete key that anchors the dam to its earth-fill portion, yet to be built at this time.

Walter Volovsek photo